This only works for immobile subjects. It would be nice to have though, For some things. And it is a pity that the SR on K-5 can't be tweaked with a firmware upgrade to do it.

In practice, this technique approx. doubles the pixel count resolution. So, the 20 MP sensor will work as a 30 MP sensor, for immobile objects. Hmmm ... to me it sounds like a 32 MP sensor would be more useful.

And so I did prove I cannot compute (earlier I proved that I cannot read). So, where did I get the notion that 2x20 = 30?